tiles, cattle bones and fired clay. An unfinished 3rd century jet ring was discovered that was probably made in Whitby. Associated turrets Each milecastle on Hadrian's Wall had two associated turret structures. These turrets were positioned approximately one-third and two-thirds of a Roman mile to the west of the Milecastle, and would probably have been manned by part of the milecastle's garrison. The turrets associated with Milecastle 17 are known as Turret 17A and Turret 17B. Turret 17A Turret 17A (Welton East) became a Scheduled Ancient Monument on 14 July 1997. The site was excavated in 1931 when a door was located in the southwest corner, the access ladder platform in the southeast and an additional platform in the northwest. One of the finds discovered in 1931 was a whinstone ballista ball. There are no visible surface remains, the site now lying beneath the B3618 Military Road. Location: Turret 17B Turret 17B (Horsley) was scheduled at the same time as Turret 17A. 17B was located on 11 June 1931 and excavated later that year. It was found to be similar to 17A with a door at the southwest and a ladder platform in the southeast and lies beneath the B3618, leaving no visible surface traces of its existence. Location: Monument records References External links 17